MECHANICAL PULPING OF COMMERCIAL THINNINGS OF 6 SOFTWOODS FROM NEW-BRUNSWICK

The properties of thermomechanical and chemithermomechanical pulps fro m plantation-grown black, Norway, red and white spruce,jack pine and t amarack have been deter mined. Specific energy, requirements were comp arable to those from juvenile woad of second-growth softwoods. The fin e fibres from these thinnings gave mechanical pulp handsheets which ha d very good tensile strengths. Pulp brightness and scattering coeffici ents were at least as good as those from mechanical pulps of mature wo od from second-growth softwoods.